Chapter 5, Problem 5.52P

Figure P6.22 provides the T-s diagram of a Carnot refrigeration cycle for which the substance is Refrigerant 134a. Determine the coefficient of performance.

Give solution to the thermodynamics problem.

1- A boiler plant comprises a boiler, superheater, economizer and air preheater. The feedwater enters the economizer at 45 °C. Air is preheated from a temperature of 15 °C to 150 °C. The steam is generated in the boiler at a pressure of 35 bar, 0.98 dry and leaves the superheater at 350 °C. When using oil of calorific value 42 MJ/kg, the evaporation rate is 10 kg steam per kg fuel and the air to fuel ratio is 20: 1 by mass. Neglecting heat losses and pressure drops, estimate the heat transfer per kg fuel in each component and the plant efficiency. Assume cp for air and flue gas as 1.005 and 1.045 kJ/ kg K, respectively.

Thermodynamics, please help with part 2 and show all work

In a power plant operating with water and steam, the following measurements and observations were done at various stages along the system: the temperature is 130oC and the phase of the substance is compressed liquid. Based on this observation, identify the following values:  pressure, P (in kPa) = _____ enthalphy, h (in kJ/kg) = _____ and the specific volume, v (in m3/kg) = _____

C5 6.

Three sub steps of a thermodynamic cycle are employed in order to change the state of a gas from 1 bar, 1.5 cubic meter and internal energy of 512 kJ. The processes are: 1st step: Compression at constant PV to a pressure of 2 bar and internal energy of 690 kJ. 2nd step: A process where work transferred is zero and heat transferred is - 150 kJ. 3rd step: A process where work transferred is -50 kJ. without KE and PE changes, determine: a. heat transferred during 1st step (kJ) b. heat transferred during 3rd step (kJ)

Q.1 A piston-cylinder device operates 1 kg of fluid at 20 bar pressure. The initial volume is 0.1 (the last digit of your id.no). The fluid is expand reversibly following the process pv¹.3 = constant. at point B the volume becomes 1.5 m³. The fluid is then cooled at a constant temperature. Calculate the work done in the cycle. p (bar) 0.1 last digit of your id. no 0.1 v cu.m Py ¹.3 B 1.5

Referring to the reversible heat pump cycle shown in the figure, p1 = 14.7 Ibf/in?, p4 = 27.8 lbf/in?, v1 = 12.6 ft³/Ib, v4 = 8.0 ft³/lb, and the gas is air obeying the ideal gas model. P4 pi TH V4 VI Determine TH, in °R, and the coefficient of performance. Step 1 Determine TH, in °R. TH = °R Save for Later Attempts: 0 of 1 used Submit Answer Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above.